Exactly what causes decell poping - V-Nation

dave the human · 09-02-2008, 04:17 PM

So what is actually happening in that Vance and hines, cfr, ftcat, thunderheader, or whatever you have attached to this wonderful thing (v-rod). S

o without any bulls__t.... who can explain it?

DrHeathenScum · 09-02-2008, 04:23 PM

letting off the gas causes it.

**capngeo** · 09-02-2008, 04:23 PM

moving more air through the engine makes it run lean unless you add more fuel either by reprogramming the ecm or adding a fuel mgt system

dave the human · 09-02-2008, 04:25 PM

so what your saying is it a lean condition?

**capngeo** · 09-02-2008, 04:29 PM

Exactly!

V-Shop · 09-02-2008, 04:40 PM

I had heard that the decell popping can be caused by too much fuel in the manifold and it not burning off. I know with the Thundermax you have a decell pop feature that enables you to tell the ecu when to shut fuel off (at a picked RPM) and when to start it again (at another RPM range).....

**capngeo** · 09-02-2008, 04:47 PM

Not really too much fuel, but too much air. All flammable gas mixtures have an upper and lower explosive limit... Too lean= no fire... too rich=no fire as well

Normally with an A/F ratio around 14:1 the exhausted (partially burnt) gas is too rich to ignite in the pipe. As the A/F ratio leans out (remember the ecm is still adding fuel assuming the factory CFM airflow setting) because of MORE AIR... the mixture moves within the explosive limits and ignites

dave the human · 09-02-2008, 04:50 PM

in the pipe, or cylinder?

V-Shop · 09-02-2008, 05:09 PM

The way the feature works is when you have it enabled and you let off the throttle (on decell) lets say at (airheads) 2940 RPM's the fuel shuts off delivery and at 2245 RPM the fuel starts delivery again. You have the capability of putting any RPM you want....With the V-Rod engines this feature is really not needed because it is a much more efficient running engine.

Quote:

Originally Posted by V-Shop

I had heard that the decell popping can be caused by too much fuel in the manifold and it not burning off. I know with the Thundermax you have a decell pop feature that enables you to tell the ecu when to shut fuel off (at a picked RPM) and when to start it again (at another RPM range).....

chopperguy58 · 09-02-2008, 05:14 PM

hey sharkey
how has the t.max been doing since by now more people have them installed? is there a thread on 1130 or here the tells of people's experiences after the install?

09-02-2008, 04:17 PM	#1 (permalink)
dave the human junior member Join Date: Jul 2008 Posts: 1,417	Exactly what causes decell poping So what is actually happening in that Vance and hines, cfr, ftcat, thunderheader, or whatever you have attached to this wonderful thing (v-rod). So without any bulls__t.... who can explain it?

09-02-2008, 04:23 PM	#2 (permalink)
DrHeathenScum The Heavycycles Guy Join Date: May 2008 Location: Petaluma, CA Bike: I Like Posts: 1,976	letting off the gas causes it. __________________ Current Heavycycles order wait time: Less than 3 weeks. Contact Me: jalbe@heavycycles.com

09-02-2008, 04:23 PM	#3 (permalink)
capngeo Mooderator Join Date: May 2008 Location: Now Sorrysota more than Key West, FL Bike: 2005 VRSCA Posts: 6,679 Blog Entries: 2	moving more air through the engine makes it run lean unless you add more fuel either by reprogramming the ecm or adding a fuel mgt system __________________ Remembering Alex Elyjiw (Steppenwolf) 7/2/59-9/14/08 "Live free or die" RIP Dave Pitt "Gearhead99" Godspeed Bill "MD Rod" Rest in Peace Sherry World's Only Firefighter Special Edition '05 VRSCA V-Rod And as far as being a biker site... I ask anybody who says that if they would ride with some asshole who pisses off somebody at every gas stop or makes a scene about shitty service at every place you stopped for a bite to eat? Have you signed up yet??>> V-mergency My Gallery

09-02-2008, 04:29 PM	#5 (permalink)
capngeo Mooderator Join Date: May 2008 Location: Now Sorrysota more than Key West, FL Bike: 2005 VRSCA Posts: 6,679 Blog Entries: 2	Exactly! __________________ Remembering Alex Elyjiw (Steppenwolf) 7/2/59-9/14/08 "Live free or die" RIP Dave Pitt "Gearhead99" Godspeed Bill "MD Rod" Rest in Peace Sherry World's Only Firefighter Special Edition '05 VRSCA V-Rod And as far as being a biker site... I ask anybody who says that if they would ride with some asshole who pisses off somebody at every gas stop or makes a scene about shitty service at every place you stopped for a bite to eat? Have you signed up yet??>> V-mergency My Gallery

09-02-2008, 04:40 PM	#6 (permalink)
V-Shop Sharkey Join Date: May 2008 Location: Maine Posts: 1,529	I had heard that the decell popping can be caused by too much fuel in the manifold and it not burning off. I know with the Thundermax you have a decell pop feature that enables you to tell the ecu when to shut fuel off (at a picked RPM) and when to start it again (at another RPM range)..... __________________ The individule activity of one man with a backbone will do more than a thousand men with a mere wish www.v-shop.us

09-02-2008, 04:25 PM	#4 (permalink)
dave the human junior member Join Date: Jul 2008 Posts: 1,417	so what your saying is it a lean condition?

09-02-2008, 04:47 PM	#7 (permalink)
capngeo Mooderator Join Date: May 2008 Location: Now Sorrysota more than Key West, FL Bike: 2005 VRSCA Posts: 6,679 Blog Entries: 2	Not really too much fuel, but too much air. All flammable gas mixtures have an upper and lower explosive limit... Too lean= no fire... too rich=no fire as well Normally with an A/F ratio around 14:1 the exhausted (partially burnt) gas is too rich to ignite in the pipe. As the A/F ratio leans out (remember the ecm is still adding fuel assuming the factory CFM airflow setting) because of MORE AIR... the mixture moves within the explosive limits and ignites __________________ Remembering Alex Elyjiw (Steppenwolf) 7/2/59-9/14/08 "Live free or die" RIP Dave Pitt "Gearhead99" Godspeed Bill "MD Rod" Rest in Peace Sherry World's Only Firefighter Special Edition '05 VRSCA V-Rod And as far as being a biker site... I ask anybody who says that if they would ride with some asshole who pisses off somebody at every gas stop or makes a scene about shitty service at every place you stopped for a bite to eat? Have you signed up yet??>> V-mergency My Gallery

09-02-2008, 04:50 PM	#8 (permalink)
dave the human junior member Join Date: Jul 2008 Posts: 1,417	in the pipe, or cylinder?

09-02-2008, 05:14 PM	#10 (permalink)
chopperguy58 Senior Member Join Date: May 2008 Location: Columbus, Ohio Bike: 2002 VRSCA Posts: 293	hey sharkey how has the t.max been doing since by now more people have them installed? is there a thread on 1130 or here the tells of people's experiences after the install?

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